Weeds Act - Frequently
Table of Contents
Why does Ontario have the Weed Control Act?
The intent of the Weed Control Act is:
- To reduce the infestation of noxious weeds that negatively
impact on the industries of agriculture and horticulture.
- To reduce plant diseases by eliminating plant disease hosts
such as common barberry and European buckthorn.
- To reduce health hazards to livestock caused by poisonous plants.
How do I contact my local area or municipal
Your local municipality, region, district or county should be
able to provide you with contact information regarding the Weed
Inspector or local by-law enforcement officer for your area.
What is a noxious weed?
In general terms the definition of noxious is:
- Harmful to living things; injurious to health.
In Ontario, 23 weeds are considered noxious under the Weed Control
Act. A list of these 23 noxious weeds can be found on the Weed
Control Act home page.
Why is milkweed on the list of noxious
weeds in Ontario?
Common milkweed can be a very difficult weed to control in many
field crops thereby causing significant reductions in crop yield
and quality. This can have a considerable negative impact to a
grower's net economic return. In the last 10 years, new herbicide
technologies have greatly improved the control of common milkweed
in field crops. However control of common milkweed around field
borders is essential as it minimizes seed spread into fields and
therefore reduces the reliance on herbicides for "in field"
Common milkweed when consumed in large quantities is poisonous
to livestock. Therefore minimizing populations in actively pastured
land will greatly reduce the chance of any adverse health affects
For more information on Milkweed and the Weed Control Act,
refer to the article entitled: "Milkweed Species in Ontario".
Can I plant milkweed in my garden?
As long as the population of milkweed planted doesn't negatively
affect agricultural or horticultual land by spreading seed and
new vegetative plant material (i.e. root stock) into fields, nurseries
or greenhouses then it is acceptable to plant milkweed in your
garden. It is recommended that you consult with your local weed
inspector and/or neighbours so that all parties involved are comfortable
that the impact to agriculture or horticulture is negligible.